Using the sLORETA, we performed a current density analysis in the 3-D Talairach/MNI space of the scalp-recorded electrical activity (Fuchs et al., 2002). The MNI brain volume was scanned at a spatial resolution Nutlin-3a order of 5 mm, and this produced 6239 cortical gray

matter voxels (Mazziotta et al., 2001). We calculated sLORETA images for prestimulus alpha power in the time frame from 800 to 200 ms prior to stimulus onset. The amplitude and latency of the P1, N1, P2 and N2 components were also evaluated. For the ERP analysis, we performed a baseline correction from 200 ms prestimulus to stimulus onset, and assessed the maximum amplitude and latency of the P1, within the time window from 100 to 200 ms poststimulus, and the minimum amplitude and latency of the N1 within the time window from 150 to 250 ms poststimulus. We also evaluated the maximum amplitude and latency of the P2, within the time window from 200 to 40 ms poststimulus, and the minimum amplitude and latency of the N2 within the time window from 400 to 600 ms poststimulus. All of these time windows were selected on the basis of their grand-averages and individual variances. These measures

were also assessed on the find more same three parietal electrodes P3, Pz and P4. The averaged values across these three electrodes were used for the statistical assessment. All measures were analyzed with a repeated measures analysis of variance (ANOVA), which included two within-subjects most factors labeled as “illuminance” (bright vs. dark) and “color–temperature”

(warm vs. cool). We used the Greenhouse–Geisser correction where appropriate. BKM carried out the experiment, conducted the data analysis and prepared the manuscript. YCJ, EK, and JYP participated in the design of the study and helped to draft the manuscript. All the authors have read and approved the final manuscript. We are thankful to Hongchae Baek, Kyoungri Park and Hyunjung Kim for helping out during the acquisition of data, and to Hyensou Pak and Yeon-Hong Jeong for providing the illumination devices for this experiment. This work was supported by a 2011 research grant from LG electronics (to E.S.K.) and Basic Science Research Program through the National Research Foundation of Korea, funded by the Ministry of Education, Science and Technology (grant number 2012R1A1A1038358 to B.K.M.) and the Ministry of Science, ICT and Future Planning (grant number 2013R1A1A1013207 to J.Y.P.). The authors declare that they have no competing interests. “
“The authors regret they failed to cite the papers outlined below in their original submission. They apologize and acknowledge they should have sought for permission before reproducing figures already included in their previous publication. The authors failed to cite their own related paper: Chen et al. (2013): Chen, X., Chen, L., Chen, J., Hu, W., Gao, H., Xie, B., Wang, X., Yin, Z., Li, S., Wang, X., 2013. ADAM17 regulates self-renewal and differentiation of U87 glioblastoma stem cells. Neurosci. Lett.